We think it's great! We ate there June 2005 and did use the Entertainment card! They have delicious steaks! Baked potatoes are great. We also love the dish of homemade seasoned potato chips & crispy onion strings that they bring out as an appetizer. We'd have eaten there twice on this trip if we had another Entertainment card, and even considered going back and paying full price. Service is very good, and it's a nice setting, too with a sort of waterfall, if I'm remembering correctly. We ate a fairly early dinner (around 6:00) and it wasn't crowded and a reservation wasn't needed at that time.
Note that it is all the way back around the resort if you're driving, and they do have valet parking (for free - just tip). We went 2 years ago and walked over from the Hilton and it ended up being a very long walk to get around the resort to the restaurant. I much preferred driving!
You could dress up a bit if you want, but we didn't feel out of place in our "nicer" park clothes. I'll also mention that we weren't made to feel "low class" either for using the Entertainment card.
Let me know if you have any other specific questions. We really like this place!